What is ASN AS396151?

ASN AS396151 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS396151?

AS396151 is listed under Steward Health Care System LLC.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

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AS396151 Steward Health Care System LLC

ASN Lookup Tool

Steward Health Care System LLC steward.org

US 18 Routes

AS Data

AS396151

AS396151 – Steward Health Care System LLC

AS Number	396151
AS Name	STEWARDHEALTHCARE
Organization	Steward Health Care System LLC(shcsl)
Country	US
Website	steward.org
Number of IPv4 Routes	18
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2017-03-21

ASN Intelligence API for production workflows

Use ASN data for AS396151 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
198.89.68.0/24	AS396151	Steward Health Care System LLC	Steward Health Care System LLC	256
198.89.74.0/24	AS396151	Steward Health Care System LLC	Steward Health Care System LLC	256
198.89.71.0/24	AS396151	Steward Health Care System LLC	Steward Health Care System LLC	256
198.89.73.0/24	AS396151	Steward Health Care System LLC	Steward Health Care System LLC	256
204.58.2.0/23	AS396151	Steward Health Care System LLC	St. Luke's Health System	512
198.89.66.0/24	AS396151	Steward Health Care System LLC	Steward Health Care System LLC	256
198.89.64.0/24	AS396151	Steward Health Care System LLC	Steward Health Care System LLC	256
198.89.77.0/24	AS396151	Steward Health Care System LLC	Steward Health Care System LLC	256
198.89.79.0/24	AS396151	Steward Health Care System LLC	Steward Health Care System LLC	256
198.89.75.0/24	AS396151	Steward Health Care System LLC	Steward Health Care System LLC	256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       396151
ASName:         STEWARDHEALTHCARE
ASHandle:       AS396151
RegDate:        2017-03-21
Updated:        2024-05-30    
Ref:            https://rdap.arin.net/registry/autnum/396151


OrgName:        Steward Health Care System LLC
OrgId:          SHCSL
Address:        2120 Dorchester Ave
City:           Dorchester
StateProv:      MA
PostalCode:     02124
Country:        US
RegDate:        2015-01-05
Updated:        2024-08-05
Ref:            https://rdap.arin.net/registry/entity/SHCSL


OrgTechHandle: THOMP1256-ARIN
OrgTechName:   Thompson, Micheal 
OrgTechPhone:  +1-617-845-3652 
OrgTechEmail:  trex10@steward.org
OrgTechRef:    https://rdap.arin.net/registry/entity/THOMP1256-ARIN

OrgTechHandle: NORDO4-ARIN
OrgTechName:   Nordone, Joseph 
OrgTechPhone:  +1-617-690-6804 
OrgTechEmail:  joenordone@aol.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NORDO4-ARIN

OrgAbuseHandle: ROSSI127-ARIN
OrgAbuseName:   Rossi, Brandon 
OrgAbusePhone:  +1-304-602-7030 
OrgAbuseEmail:  brandon.rossi@steward.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ROSSI127-ARIN

OrgAbuseHandle: THOMP1256-ARIN
OrgAbuseName:   Thompson, Micheal 
OrgAbusePhone:  +1-617-845-3652 
OrgAbuseEmail:  trex10@steward.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/THOMP1256-ARIN

OrgAbuseHandle: NORDO4-ARIN
OrgAbuseName:   Nordone, Joseph 
OrgAbusePhone:  +1-617-690-6804 
OrgAbuseEmail:  joenordone@aol.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NORDO4-ARIN

OrgTechHandle: ROSSI127-ARIN
OrgTechName:   Rossi, Brandon 
OrgTechPhone:  +1-304-602-7030 
OrgTechEmail:  brossi@qhcus.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ROSSI127-ARIN

OrgTechHandle: NORDO6-ARIN
OrgTechName:   Nordone, Joe 
OrgTechPhone:  +1-617-690-6804 
OrgTechEmail:  joseph.nordone@steward.org
OrgTechRef:    https://rdap.arin.net/registry/entity/NORDO6-ARIN

OrgAbuseHandle: NORDO6-ARIN
OrgAbuseName:   Nordone, Joe 
OrgAbusePhone:  +1-617-690-6804 
OrgAbuseEmail:  joseph.nordone@steward.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NORDO6-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS7015	Comcast Cable Communications, LLC	US
AS17378	TierPoint, LLC	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS7015	Comcast Cable Communications, LLC	US
AS17378	TierPoint, LLC	US